Lifting-jack



(No Model.)

J.. W. MAHAFPBY & A. RHALDBMAN. LIFTING JACK.

mil" y 'UNITED STATES PATENT OFFICE.

JAMES W. MAHAFFEY, OF VILLIAMSPORT, AND AQUILLA F. HALDEMAN, OF

TURBOTVILLE, PENNSYLVANIA.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 500,689, dated uly 4.,1893-.

v Application filed August 12, 1892. Renewed June 6. 1893. Serial No.l76,719. (No model.)

To all whom t may concern:

Beit known that we, JAMES W. MAHAEEEY, residing at Williamsport, in thecounty of Lycoming, and AQUILLA F. HALDEMAN, residing at Turbotville, inthe county of Northumberland, State of Pennsylvania, citizens ot theUnited States, have invented certain new and useful Improvements inLifting-Jacks; and we do hereby declare that the following is a [o full,clear, and exact description of the same, reference being had to theannexed drawing, making a part ot this specication, and to the lettersof reference marked thereon.

The present invention has for its object to provide a simple andpractically operating jack for lifting or raising Vehicle bodies and forall purposes for which a device of this character is or may be founduseful, and the invention consists in a jack constructed subzostantially as shown in the drawing and hereinatter described andclaimed.

In the accompanying drawing which represents a perspective view of thelifting jack constructed in accordance With our invention,

z5 A indicates two short standards and B similar standards but ot'somewhat greater height. These standards are suitably connected by boltsor otherwise to the sides of a support C and near the ends thereof, saidstandards being strengthened by an inclined brace D which extendsbetween the standards and connected thereto in any suitable and wellknown manner. The standards B have pivoted between them the inner end ofan operating lever II, said pivoted end being shown at E and is of suchwidth as to allow room for the pivoting thereto of the links F. Theselinks form an extension or continuation ofthe standards B when in anupright or vertical 4o position as shown in full lines in the drawing.

To the upper ends of the links F is pivoted one end of a notched bar Gand the opposite end of said bar is in `like manner pivoted to the shortstandards A.

The upper ends of the standards B are inclined as shown at d and thelower ends of the links F are rounded as shown at b so as to allow thelinks to assume the position shown in dotted lines, when the lever israised.

The standards A form guides for the end ot' 5o the notched bar G andwhen Weight of any object is supported thereby, the standards preventany displacement of the notched bar by any lateral strain thereon.

The diagonal or inclined brace D serves the purpose of preventing thestandards from spreading laterally in an outward direction.

When the lever I-I is depressed as shown in full lines, the links F arein an upright position and on line with the standards B, the in- 6a nerends ot` the links and standards lbeing in contact, the ends of thestandards forming supports for the ends of the links and thus taking thestrain od the pivots of the lever. When the lever isin araised positionas shown in dotted lines, the end of said lever will form a support forthe notched bar G.

Having now fully described our invention, what we claim as new, anddesire to secure by Letters Patent, iso In a lifting-jack, the standardsA B having inclined brace D connected thereto, in combination with thepivoted notched bar G, the links F pivoted thereto, and the lever I-Ipivoted to the links and to the standards as shown, said standards andlinks having inclined and rounded ends respectively, the end of thelever when raised forming a support for the notched bar and whendepressed the ends of the links coming in contact with the So ends ofthe standards, substantially as and for the purpose set forth.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

JAMES W. MAHAFFEY. AQUILLA F. HALDEMAN. Witnesses:

JAMES B. CORYELL, WILLIAM L. HAwKINs.

